Sectional dumping grate



April 30, 1957 J. w. HEBERT. 2,790,401

SECTIONAL DUMPING GRATE Filed May 29. 1953 2 Sheets-Sheet l I V EN TOR.

A 7' TORNE YS United States Patent 2,790,401 SECTIONAE DUMPING GRATE John W. Hebert, nay City, Mich., assignor to Calcinator Corporation, Bay City, Mich. Application May'29, 1953, Serial No. 358,476 SClaims. c1. 11018)- This invention relates to grates for incinerators and more panticularly to'a sectional grate capable of dumping action as it is beingreciproclated;

One'oftheprime'objects ofthe invention is to de sign a horizontally disposed grate 'h'aving' a pivoted dumping section, and provide 'means whereby the pivoted sec tion may be dumped: to discharge non-combustible matter as the main grate isho'rizontally reciprocated to clean ash therefrom.

Anoth-erobject of the invention is to de sign'a's'ectional gnate 'of'simple, practicalaird economical construction which can be readily manufactured and mounte'd.

A further object is to provide a sectional grate'incliuding a dumping seoti'on pivotally mounted off-center, in-i termediate the length thereof, and provide .a manually actuatedrneans selectively engageable with said pivoted section for tilting said section to dumping prosition'as the grate is reciprocated.

A further object still' is todesign asectionalgrate'irn eluding both a main section and a pivoted sectionytc'rget-her with manually adjustable means engageable with the pivoted section for ldumping'said section to' clear it of cans, bottles, wire and other uncombustibles' as" the main grate section is being reciprocated.

Still a further object is to providea shaft mounting-as sociated with the grate andprovidebearings in the casing from which'the shaker shaft can"beremoved" without removal or disassembly of the bearings orwcasingp With the above and otherobjects in View; the present invention consists in the combination and arrangcment of parts, hereinafter more fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims, it being understood that changes may be made in-the form,;size', proportion; and minordetails of construction, without departingjrom the spirit, or sacrificing any of the :advantagesofthe invention.

In the drawings:

Fig.- l is a sideelevati-onal view of an-inoinerator with the side wall being broken away to show thegrate andassociated parts. v I

Fig. -2 is a sectional, front elevational view of the in-- cinerator casing with the bearings, shakershaft and engaging pin in position. A a 1 Fig. 3 is an enlarged, top plan view 'of'my: sectional grate.

Fig.

grate.

Fig. 5 is a view similar to Fig. 4, the broken lines showing the pivoted grate section swung to'dp-mping position.

Fig. 6 is a'perspect-ive view of oneof the shaker shaft bearings.

4 is an enlarged, edge elevational-view of the Fig. 7 is an enlarged, side elevationalvi ewfoforie of the grate dumping pins. 7

Fig. 8 is an end elevational View thereof, 7, v t p Fig. 9 is a fr'agmentary,side elevational view of theside Wall of the casing showingthe keyhole'slot to-accommodate the dumping. pin. V

Referring now more particularly to the drawings in which I have shown the 'preferred embodirnent of, my invention, the letter-lindicates the insulated casing. of a I fret e 1 7 hoiisehold incinerator forburning'garbage", trash arid other combustible wastes. The incinerator is preferably slightly rectangular in shapeiarrdisprovided with horizontally dispos ed tracks T secured on the side'walls'o-f the inner casing 7 iii any desired n ianrier. I A v A sectional grate structure G is monted for reciprocable sliding movementon tracks T, said grate comprising a rectangular-shapedmainframe 8 formed with'spac'edapart transversely disposed bars 9 spanning theframe 8 and'a center-banltl is cast'integral'therewith; An en'- larged, circular'openingll is'foi med adjacentthe front edge of the shown); V

Bearing housings 12 are provided on the upper; face of the main frame'8,-and'vertically slotted" recesses 14 are formedin'the 'inner' face of each bearingand for a purpose to be presently-described; p I

An open areaA' is provided'i'n the" grate frameB-intermediate its length, and a forwardly projecting lug'15 is formeidon'the center bar 9, the upper facelof thelug being disp'osedbelow the faceof the grade and projects into the area A as shown. A- dumping grate section'D is accommodated in the area A and is ribbed in sub stantially the same manner as is the main frame, and trunnions 16 are. cast :onthe upper face of the dumping section and are rotatably' mounted in the bearings 12 as shown. A stepped lug 17 is cast integral with the rear edge :of the dumping secti'On'D and overlies the lug 15 to support the dumping section inhorizontalalignment with theface' of-th'e main grate frame, and I Wish to direct particular attention to' the fact that this pivoted section normally lies flat withthe face ofthe main grate and pivots only when connected for dumping action, as will behereinafter fully described. 1

Downwardly projecting fingers 18 are cast on the lower face of the main frame8 directly below the bearings 12, and form an open slot thereb'etween to accommodate a horizontally disposed, retractable dumping pin P for trip ping'the dumping section D when it is desired to clean the grate of bottles,- Wiresand otherinon-combustible matter whenever the grate becomes clogged.

A forwardly projecting lug 19 is cast on the front edge of the grate'G, and a slotted opening 20 is formed therein to accommodate the free en'dof a crank 21 which" is mounted on a transversely disposed shaft 22, and bosses 23 are provided on the side edges of the main frame to minimize wear and frictio The grate-actuatingmechanism, comprises the transversely disposed shaft 22 on which the crank 21 is mounted, and transversely disposed projecting pins 24 are providedin the shaft adjacent the ends thereof, the

end sections offthe shaft being revolvably mounted in the pressed bearingsZSIsee'FigM 6 of the. drawings). These head, with the free' end bearings 24 are hollow as shown, the inner ends being formed with a bearing opening 26, and opposed slots 27 lead into said op eningso that; the shaft 22 with pins 24 may 'be' .insentedtherein bearing "opening 25. The outer end of the bearing 25 is flanged as at 28 to fitin snug facial contact with the incineratoncasing, and theopenin g-in the bearing permits insertion of thesh-aker handle H fior grate to cleanthe ashesfrom the face thereof.

Keyhole slots 29 are of said slots, said pin being'formed with a head 30, and a spring S is mounted on thepin directly adjacent said the body of the pin, loops mediate the" length modat'ed'in the radially disposed section 33 of the-slot,- and when'the pin is in retracted position, the loop-31 engages the marginal cjdgejof the slot 29,, and in this-posit grate oen'ecn beneath the burner (not with the shaft rotatable in the. V

reciprocation of the I p v provided-in each sidewall of the casing, and a pin. P is adjustably mounted in'one spaced'from. and overhanging V 31 and 32 being formed inter ofthe spring. This spring is accom ,one unit. The operator merely depresses the spring S,

forcing the pin inwardly until the tapered free end is disposed in the notch between the fingers 18, the depending fiange 34 forming a continuation of the forked member 18, and when the grate is reciprocated, the center section D will be dumped as clearly shown in Fig. 5 of the drawings, and this dumping action will be repeated upon each stroke of the grate. To disengage, itis merely necessary to retract the pin to former position so that the loop 32 engages the wall of the casing, thus holding it in position. 4

I The operation of the grate is as follows When it is desired to shake or reciprocate the grate in the conventional manner, i. e., back and forth, to shake the ash therefrom, the operator merely inserts the end of the shaker handle H in one of the bearings 25, .so that it engages the end of the shaft 22 and the pin 24, and then by rocking the shaker handle, the entire grate will be reciprocated back and forth to dislodge all ash on the face thereof.

When the grate becomes clogged with cans, wire or other non-combustible material, it is then necessary to tilt the dumping section D simultaneously with the reciprocation of the grate to dump the non-combustibles; the shaker handle H is first pulled fully forward; the locking pin P is then pushed inwardly to engage between the fingers 13 with the loop 31 engaging the side wall of the casing and holding it in position, and the grate is then reciprocated in the conventional manner, and on each forward stroke of the grate, the dumping section will be tilted to position as clearly shown in Fig. 5 of the drawing. The shaking action should be continued until the face of the grate has been completely cleaned, after which the shaker handle is again pulled fully forward,

the pin retracted so that the loop 32 engages the wall of the casing to prevent displacement of the pin, and the entire grate is now free for continued reciprocatory shaking action, but will not dump as the oif-center mounting maintains it in horizontal position. The specific type bearing makes it possible to easily and quickly remove the shaft and crank when for any reason it is desired to replace, repair or change any portion of the grate or its actuating mechanism. g a

From the foregoing description, it will be obvious that I have perfected a very simple, practical and economical grate structure, which will have both a conventional reciprocatory shaking action and a dumping action and which can be selectively utilized for dumping'whenever the grate surface becomes clogged with non combustible material of a size which will not pass between the grate bars. I V

-1. In an incinerator, ahousing, spaced-apart, parallel guides therein, a grate mounted for reciprocatory move ment on said guides, means for reciprocating said grate, the said grate including a pair of relatively movable sections, one of which is pivotal relative to the other a lug on said pivotal section and a pin transverse to the path of. reciprocatory movement of said grate normally fixed with respect to the direction of reciprocatory movement of the grate, said pin being disposed normally out of the path of the grate and'rnovable into the path of said ing" in a plane which ispfiset to the pivotal" axis of the pivotal se'ction'to tip said'pivotal section when engaged by the lug during reciprocatorymovementlof thesaid grate.

T-The combination defined in claim 1 in which spring means engageable withsaid casingIisprovided to hold said pin in inner and outer positions. 7 i i -'--3. The combination defined in claim 1 in which said lug is bifurcated and said pin is aligned to extend between the bifurcated portions thereof.

4. In an incinerator, a housing, guides therein, a tippable grate mounted for reciprocatory travel on said guides, means for reciprocating said grate, cam means on said grate, and means fixed'with respect to the direction of reciprocation of said grate and normally disposed out of the path of reciprocatory travel of said grate movable in aplane offset to the tipping axis of said grate into the path of said cam means to tip said grate when engaged by the said cam means during reciprocation of said grate.

' 5. In an incinerator, guide means therein, a sectional grate reciprocatory on said guide means including a main frame grate section, means for reciprocating said main section, a rockable section pivotally mounted on said main section, a depending lug provided on the lower face of the rockable section, and means independent'of said means for reciprocating said main section and normally out of engagement with said rockable section movable into the path of thereof and held in a position to cause pivoting of said rockable section relative to said main section when said rockable section and last mentioned means come into engagement, said last mentioned means including a pin engageable with said lug and causing the rocking of said rockable section when the main grate is reciprocated.

6. In an incinerator having a casing, a sectional grate mounted for reciprocating movement therein comprising, a main frame, means for reciprocating said frame, a pivotally mounted dumping section in said main frame, carn means on said dumping section, and manually operable means normally disposed out of the path of reciprocation of said grate movable into the path of re ciprocation of said cam means and held in a position to cause the swinging of said dumping section about its pivot points as the grateis actuated and said cam means engages said manually operable means.

7. The combination defined in claim 6 in which the dumping section is pivotally mounted, off-center, and a stop is provided on the main section engageable with the dumping section to limit downward movement of one end of said dumping section.

8. In an incinerator of the class described, a casing, a sectional grate mounted'for' substantially horizontal reciprocating movement therein comprising, a main frame section and adumping section pivotally mounted off-center in the main frame section and rockable in a vertical plane, said dumping section having a cam thereon, means connected to said main framesection for reciprocating said main frame section, means disposed transversely to the path of reciprocating movement of said grate and out of the path thereof movable intothe path of said dumping section and held in a position to rock it to dumping position when the mainframe is actuated, said last mentioned means comprising a transversely adjustable pin against which said cam rides to rock said section when the grate is reciprocated, and means on said pin for releasably securing it in various position of adjustment;

References Cited in the file of this patent UNITED STATES PATENTS ."sur 

